locore.S revision 286977
1/*- 2 * Copyright (C) 2007-2009 Semihalf, Rafal Jaworowski <raj@semihalf.com> 3 * Copyright (C) 2006 Semihalf, Marian Balakowicz <m8@semihalf.com> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 18 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 20 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 22 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 23 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 24 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/powerpc/booke/locore.S 286977 2015-08-21 02:41:35Z jhibbits $ 27 */ 28 29#include "assym.s" 30 31#include "opt_hwpmc_hooks.h" 32 33#include <machine/asm.h> 34#include <machine/hid.h> 35#include <machine/param.h> 36#include <machine/spr.h> 37#include <machine/pte.h> 38#include <machine/trap.h> 39#include <machine/vmparam.h> 40#include <machine/tlb.h> 41 42#define TMPSTACKSZ 16384 43 44 .text 45 .globl btext 46btext: 47 48/* 49 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 50 * mark the start of kernel text. 51 */ 52 .globl kernel_text 53kernel_text: 54 55/* 56 * Startup entry. Note, this must be the first thing in the text segment! 57 */ 58 .text 59 .globl __start 60__start: 61 62/* 63 * Assumptions on the boot loader: 64 * - System memory starts from physical address 0 65 * - It's mapped by a single TLB1 entry 66 * - TLB1 mapping is 1:1 pa to va 67 * - Kernel is loaded at 64MB boundary 68 * - All PID registers are set to the same value 69 * - CPU is running in AS=0 70 * 71 * Registers contents provided by the loader(8): 72 * r1 : stack pointer 73 * r3 : metadata pointer 74 * 75 * We rearrange the TLB1 layout as follows: 76 * - Find TLB1 entry we started in 77 * - Make sure it's protected, invalidate other entries 78 * - Create temp entry in the second AS (make sure it's not TLB[1]) 79 * - Switch to temp mapping 80 * - Map 64MB of RAM in TLB1[1] 81 * - Use AS=1, set EPN to KERNBASE and RPN to kernel load address 82 * - Switch to to TLB1[1] mapping 83 * - Invalidate temp mapping 84 * 85 * locore registers use: 86 * r1 : stack pointer 87 * r2 : trace pointer (AP only, for early diagnostics) 88 * r3-r27 : scratch registers 89 * r28 : temp TLB1 entry 90 * r29 : initial TLB1 entry we started in 91 * r30-r31 : arguments (metadata pointer) 92 */ 93 94/* 95 * Keep arguments in r30 & r31 for later use. 96 */ 97 mr %r30, %r3 98 mr %r31, %r4 99 100/* 101 * Initial cleanup 102 */ 103 li %r3, PSL_DE /* Keep debug exceptions for CodeWarrior. */ 104 mtmsr %r3 105 isync 106 107 mfpvr %r3 108 rlwinm %r3, %r3, 16, 16, 31 109 110 lis %r4, HID0_E500_DEFAULT_SET@h 111 ori %r4, %r4, HID0_E500_DEFAULT_SET@l 112 113 /* Check for e500mc and e5500 */ 114 cmpli 0, 0, %r3, FSL_E500mc 115 bne 2f 116 117 lis %r4, HID0_E500MC_DEFAULT_SET@h 118 ori %r4, %r4, HID0_E500MC_DEFAULT_SET@l 119 b 3f 1202: 121 cmpli 0, 0, %r3, FSL_E5500 122 bne 3f 123 124 lis %r4, HID0_E5500_DEFAULT_SET@h 125 ori %r4, %r4, HID0_E5500_DEFAULT_SET@l 126 1273: 128 mtspr SPR_HID0, %r4 129 isync 130 131/* 132 * E500mc and E5500 do not have HID1 register, so skip HID1 setup on 133 * this core. 134 */ 135 cmpli 0, 0, %r3, FSL_E500mc 136 beq 1f 137 cmpli 0, 0, %r3, FSL_E5500 138 beq 1f 139 140 lis %r3, HID1_E500_DEFAULT_SET@h 141 ori %r3, %r3, HID1_E500_DEFAULT_SET@l 142 mtspr SPR_HID1, %r3 143 isync 1441: 145 /* Invalidate all entries in TLB0 */ 146 li %r3, 0 147 bl tlb_inval_all 148 149 cmpwi %r30, 0 150 beq done_mapping 151 152/* 153 * Locate the TLB1 entry that maps this code 154 */ 155 bl 1f 1561: mflr %r3 157 bl tlb1_find_current /* the entry found is returned in r29 */ 158 159 bl tlb1_inval_all_but_current 160 161/* 162 * Create temporary mapping in AS=1 and switch to it 163 */ 164 addi %r3, %r29, 1 165 bl tlb1_temp_mapping_as1 166 167 mfmsr %r3 168 ori %r3, %r3, (PSL_IS | PSL_DS) 169 bl 2f 1702: mflr %r4 171 addi %r4, %r4, 20 172 mtspr SPR_SRR0, %r4 173 mtspr SPR_SRR1, %r3 174 rfi /* Switch context */ 175 176/* 177 * Invalidate initial entry 178 */ 179 mr %r3, %r29 180 bl tlb1_inval_entry 181 182/* 183 * Setup final mapping in TLB1[1] and switch to it 184 */ 185 /* Final kernel mapping, map in 64 MB of RAM */ 186 lis %r3, MAS0_TLBSEL1@h /* Select TLB1 */ 187 li %r4, 0 /* Entry 0 */ 188 rlwimi %r3, %r4, 16, 10, 15 189 mtspr SPR_MAS0, %r3 190 isync 191 192 li %r3, (TLB_SIZE_64M << MAS1_TSIZE_SHIFT)@l 193 oris %r3, %r3, (MAS1_VALID | MAS1_IPROT)@h 194 mtspr SPR_MAS1, %r3 /* note TS was not filled, so it's TS=0 */ 195 isync 196 197 lis %r3, KERNBASE@h 198 ori %r3, %r3, KERNBASE@l /* EPN = KERNBASE */ 199#ifdef SMP 200 ori %r3, %r3, MAS2_M@l /* WIMGE = 0b00100 */ 201#endif 202 mtspr SPR_MAS2, %r3 203 isync 204 205 /* Discover phys load address */ 206 bl 3f 2073: mflr %r4 /* Use current address */ 208 rlwinm %r4, %r4, 0, 0, 5 /* 64MB alignment mask */ 209 ori %r4, %r4, (MAS3_SX | MAS3_SW | MAS3_SR)@l 210 mtspr SPR_MAS3, %r4 /* Set RPN and protection */ 211 isync 212 bl zero_mas7 213 bl zero_mas8 214 tlbwe 215 isync 216 msync 217 218 /* Switch to the above TLB1[1] mapping */ 219 bl 4f 2204: mflr %r4 221 rlwinm %r4, %r4, 0, 8, 31 /* Current offset from kernel load address */ 222 rlwinm %r3, %r3, 0, 0, 19 223 add %r4, %r4, %r3 /* Convert to kernel virtual address */ 224 addi %r4, %r4, 36 225 li %r3, PSL_DE /* Note AS=0 */ 226 mtspr SPR_SRR0, %r4 227 mtspr SPR_SRR1, %r3 228 rfi 229 230/* 231 * Invalidate temp mapping 232 */ 233 mr %r3, %r28 234 bl tlb1_inval_entry 235 236done_mapping: 237 238/* 239 * Setup a temporary stack 240 */ 241 bl 1f 242 .long tmpstack-. 2431: mflr %r1 244 lwz %r2,0(%r1) 245 add %r1,%r1,%r2 246 addi %r1, %r1, (TMPSTACKSZ - 16) 247 248/* 249 * Relocate kernel 250 */ 251 bl 1f 252 .long _DYNAMIC-. 253 .long _GLOBAL_OFFSET_TABLE_-. 2541: mflr %r5 255 lwz %r3,0(%r5) /* _DYNAMIC in %r3 */ 256 add %r3,%r3,%r5 257 lwz %r4,4(%r5) /* GOT pointer */ 258 add %r4,%r4,%r5 259 lwz %r4,4(%r4) /* got[0] is _DYNAMIC link addr */ 260 subf %r4,%r4,%r3 /* subtract to calculate relocbase */ 261 bl elf_reloc_self 262 263/* 264 * Initialise exception vector offsets 265 */ 266 bl ivor_setup 267 268/* 269 * Set up arguments and jump to system initialization code 270 */ 271 mr %r3, %r30 272 mr %r4, %r31 273 274 /* Prepare core */ 275 bl booke_init 276 277 /* Switch to thread0.td_kstack now */ 278 mr %r1, %r3 279 li %r3, 0 280 stw %r3, 0(%r1) 281 282 /* Machine independet part, does not return */ 283 bl mi_startup 284 /* NOT REACHED */ 2855: b 5b 286 287 288#ifdef SMP 289/************************************************************************/ 290/* AP Boot page */ 291/************************************************************************/ 292 .text 293 .globl __boot_page 294 .align 12 295__boot_page: 296 bl 1f 297 298 .globl bp_ntlb1s 299bp_ntlb1s: 300 .long 0 301 302 .globl bp_tlb1 303bp_tlb1: 304 .space 4 * 3 * 16 305 306 .globl bp_tlb1_end 307bp_tlb1_end: 308 309/* 310 * Initial configuration 311 */ 3121: mflr %r31 /* r31 hold the address of bp_ntlb1s */ 313 314 /* Set HIDs */ 315 mfpvr %r3 316 rlwinm %r3, %r3, 16, 16, 31 317 318 /* HID0 for E500 is default */ 319 lis %r4, HID0_E500_DEFAULT_SET@h 320 ori %r4, %r4, HID0_E500_DEFAULT_SET@l 321 322 cmpli 0, 0, %r3, FSL_E500mc 323 bne 2f 324 lis %r4, HID0_E500MC_DEFAULT_SET@h 325 ori %r4, %r4, HID0_E500MC_DEFAULT_SET@l 326 b 3f 3272: 328 cmpli 0, 0, %r3, FSL_E5500 329 bne 3f 330 lis %r4, HID0_E5500_DEFAULT_SET@h 331 ori %r4, %r4, HID0_E5500_DEFAULT_SET@l 3323: 333 mtspr SPR_HID0, %r4 334 isync 335/* 336 * E500mc and E5500 do not have HID1 register, so skip HID1 setup on 337 * this core. 338 */ 339 cmpli 0, 0, %r3, FSL_E500mc 340 beq 1f 341 cmpli 0, 0, %r3, FSL_E5500 342 beq 1f 343 344 lis %r3, HID1_E500_DEFAULT_SET@h 345 ori %r3, %r3, HID1_E500_DEFAULT_SET@l 346 mtspr SPR_HID1, %r3 347 isync 3481: 349 /* Enable branch prediction */ 350 li %r3, BUCSR_BPEN 351 mtspr SPR_BUCSR, %r3 352 isync 353 354 /* Invalidate all entries in TLB0 */ 355 li %r3, 0 356 bl tlb_inval_all 357 358/* 359 * Find TLB1 entry which is translating us now 360 */ 361 bl 2f 3622: mflr %r3 363 bl tlb1_find_current /* the entry number found is in r29 */ 364 365 bl tlb1_inval_all_but_current 366 367/* 368 * Create temporary translation in AS=1 and switch to it 369 */ 370 lwz %r3, 0(%r31) 371 bl tlb1_temp_mapping_as1 372 373 mfmsr %r3 374 ori %r3, %r3, (PSL_IS | PSL_DS) 375 bl 3f 3763: mflr %r4 377 addi %r4, %r4, 20 378 mtspr SPR_SRR0, %r4 379 mtspr SPR_SRR1, %r3 380 rfi /* Switch context */ 381 382/* 383 * Invalidate initial entry 384 */ 385 mr %r3, %r29 386 bl tlb1_inval_entry 387 388/* 389 * Setup final mapping in TLB1[1] and switch to it 390 */ 391 lwz %r6, 0(%r31) 392 addi %r5, %r31, 4 393 li %r4, 0 394 3954: lis %r3, MAS0_TLBSEL1@h 396 rlwimi %r3, %r4, 16, 12, 15 397 mtspr SPR_MAS0, %r3 398 isync 399 lwz %r3, 0(%r5) 400 mtspr SPR_MAS1, %r3 401 isync 402 lwz %r3, 4(%r5) 403 mtspr SPR_MAS2, %r3 404 isync 405 lwz %r3, 8(%r5) 406 mtspr SPR_MAS3, %r3 407 isync 408 tlbwe 409 isync 410 msync 411 addi %r5, %r5, 12 412 addi %r4, %r4, 1 413 cmpw %r4, %r6 414 blt 4b 415 416 /* Switch to the final mapping */ 417 bl 5f 418 .long __boot_page-. 4195: mflr %r5 420 lwz %r3,0(%r3) 421 add %r5,%r5,%r3 /* __boot_page in r5 */ 422 bl 6f 4236: mflr %r3 424 rlwinm %r3, %r3, 0, 0xfff /* Offset from boot page start */ 425 add %r3, %r3, %r5 /* Make this virtual address */ 426 addi %r3, %r3, 32 427 li %r4, 0 /* Note AS=0 */ 428 mtspr SPR_SRR0, %r3 429 mtspr SPR_SRR1, %r4 430 rfi 431 432/* 433 * At this point we're running at virtual addresses KERNBASE and beyond so 434 * it's allowed to directly access all locations the kernel was linked 435 * against. 436 */ 437 438/* 439 * Invalidate temp mapping 440 */ 441 mr %r3, %r28 442 bl tlb1_inval_entry 443 444/* 445 * Setup a temporary stack 446 */ 447 bl 1f 448 .long tmpstack-. 4491: mflr %r1 450 lwz %r2,0(%r1) 451 add %r1,%r1,%r2 452 addi %r1, %r1, (TMPSTACKSZ - 16) 453 454/* 455 * Initialise exception vector offsets 456 */ 457 bl ivor_setup 458 459 /* 460 * Assign our pcpu instance 461 */ 462 bl 1f 463 .long ap_pcpu-. 4641: mflr %r4 465 lwz %r3, 0(%r4) 466 add %r3, %r3, %r4 467 lwz %r3, 0(%r3) 468 mtsprg0 %r3 469 470 bl pmap_bootstrap_ap 471 472 bl cpudep_ap_bootstrap 473 /* Switch to the idle thread's kstack */ 474 mr %r1, %r3 475 476 bl machdep_ap_bootstrap 477 478 /* NOT REACHED */ 4796: b 6b 480#endif /* SMP */ 481 482/* 483 * Invalidate all entries in the given TLB. 484 * 485 * r3 TLBSEL 486 */ 487tlb_inval_all: 488 rlwinm %r3, %r3, 3, (1 << 3) /* TLBSEL */ 489 ori %r3, %r3, (1 << 2) /* INVALL */ 490 tlbivax 0, %r3 491 isync 492 msync 493 494 tlbsync 495 msync 496 blr 497 498/* 499 * expects address to look up in r3, returns entry number in r29 500 * 501 * FIXME: the hidden assumption is we are now running in AS=0, but we should 502 * retrieve actual AS from MSR[IS|DS] and put it in MAS6[SAS] 503 */ 504tlb1_find_current: 505 mfspr %r17, SPR_PID0 506 slwi %r17, %r17, MAS6_SPID0_SHIFT 507 mtspr SPR_MAS6, %r17 508 isync 509 tlbsx 0, %r3 510 mfspr %r17, SPR_MAS0 511 rlwinm %r29, %r17, 16, 20, 31 /* MAS0[ESEL] -> r29 */ 512 513 /* Make sure we have IPROT set on the entry */ 514 mfspr %r17, SPR_MAS1 515 oris %r17, %r17, MAS1_IPROT@h 516 mtspr SPR_MAS1, %r17 517 isync 518 tlbwe 519 isync 520 msync 521 blr 522 523/* 524 * Invalidates a single entry in TLB1. 525 * 526 * r3 ESEL 527 * r4-r5 scratched 528 */ 529tlb1_inval_entry: 530 lis %r4, MAS0_TLBSEL1@h /* Select TLB1 */ 531 rlwimi %r4, %r3, 16, 10, 15 /* Select our entry */ 532 mtspr SPR_MAS0, %r4 533 isync 534 tlbre 535 li %r5, 0 /* MAS1[V] = 0 */ 536 mtspr SPR_MAS1, %r5 537 isync 538 tlbwe 539 isync 540 msync 541 blr 542 543/* 544 * r3 entry of temp translation 545 * r29 entry of current translation 546 * r28 returns temp entry passed in r3 547 * r4-r5 scratched 548 */ 549tlb1_temp_mapping_as1: 550 mr %r28, %r3 551 552 /* Read our current translation */ 553 lis %r3, MAS0_TLBSEL1@h /* Select TLB1 */ 554 rlwimi %r3, %r29, 16, 10, 15 /* Select our current entry */ 555 mtspr SPR_MAS0, %r3 556 isync 557 tlbre 558 559 /* Prepare and write temp entry */ 560 lis %r3, MAS0_TLBSEL1@h /* Select TLB1 */ 561 rlwimi %r3, %r28, 16, 10, 15 /* Select temp entry */ 562 mtspr SPR_MAS0, %r3 563 isync 564 mfspr %r5, SPR_MAS1 565 li %r4, 1 /* AS=1 */ 566 rlwimi %r5, %r4, 12, 19, 19 567 li %r4, 0 /* Global mapping, TID=0 */ 568 rlwimi %r5, %r4, 16, 8, 15 569 oris %r5, %r5, (MAS1_VALID | MAS1_IPROT)@h 570 mtspr SPR_MAS1, %r5 571 isync 572 mflr %r3 573 bl zero_mas7 574 bl zero_mas8 575 mtlr %r3 576 tlbwe 577 isync 578 msync 579 blr 580 581/* 582 * Loops over TLB1, invalidates all entries skipping the one which currently 583 * maps this code. 584 * 585 * r29 current entry 586 * r3-r5 scratched 587 */ 588tlb1_inval_all_but_current: 589 mr %r6, %r3 590 mfspr %r3, SPR_TLB1CFG /* Get number of entries */ 591 andi. %r3, %r3, TLBCFG_NENTRY_MASK@l 592 li %r4, 0 /* Start from Entry 0 */ 5931: lis %r5, MAS0_TLBSEL1@h 594 rlwimi %r5, %r4, 16, 10, 15 595 mtspr SPR_MAS0, %r5 596 isync 597 tlbre 598 mfspr %r5, SPR_MAS1 599 cmpw %r4, %r29 /* our current entry? */ 600 beq 2f 601 rlwinm %r5, %r5, 0, 2, 31 /* clear VALID and IPROT bits */ 602 mtspr SPR_MAS1, %r5 603 isync 604 tlbwe 605 isync 606 msync 6072: addi %r4, %r4, 1 608 cmpw %r4, %r3 /* Check if this is the last entry */ 609 bne 1b 610 blr 611 612/* 613 * MAS7 and MAS8 conditional zeroing. 614 */ 615.globl zero_mas7 616zero_mas7: 617 mfpvr %r20 618 rlwinm %r20, %r20, 16, 16, 31 619 cmpli 0, 0, %r20, FSL_E500v1 620 beq 1f 621 622 li %r20, 0 623 mtspr SPR_MAS7, %r20 624 isync 6251: 626 blr 627 628.globl zero_mas8 629zero_mas8: 630 mfpvr %r20 631 rlwinm %r20, %r20, 16, 16, 31 632 cmpli 0, 0, %r20, FSL_E500mc 633 beq 1f 634 cmpli 0, 0, %r20, FSL_E5500 635 beq 1f 636 637 blr 6381: 639 li %r20, 0 640 mtspr SPR_MAS8, %r20 641 isync 642 blr 643 644#ifdef SMP 645__boot_page_padding: 646 /* 647 * Boot page needs to be exactly 4K, with the last word of this page 648 * acting as the reset vector, so we need to stuff the remainder. 649 * Upon release from holdoff CPU fetches the last word of the boot 650 * page. 651 */ 652 .space 4092 - (__boot_page_padding - __boot_page) 653 b __boot_page 654#endif /* SMP */ 655 656/************************************************************************/ 657/* locore subroutines */ 658/************************************************************************/ 659 660/* 661 * void tid_flush(tlbtid_t tid); 662 * 663 * Invalidate all TLB0 entries which match the given TID. Note this is 664 * dedicated for cases when invalidation(s) should NOT be propagated to other 665 * CPUs. 666 * 667 * void tid_flush(tlbtid_t tid, int tlb0_ways, int tlb0_entries_per_way); 668 * 669 * XXX: why isn't this in C? 670 */ 671ENTRY(tid_flush) 672 cmpwi %r3, TID_KERNEL 673 beq tid_flush_end /* don't evict kernel translations */ 674 675 /* Disable interrupts */ 676 mfmsr %r10 677 wrteei 0 678 679 li %r6, 0 /* ways counter */ 680loop_ways: 681 li %r7, 0 /* entries [per way] counter */ 682loop_entries: 683 /* Select TLB0 and ESEL (way) */ 684 lis %r8, MAS0_TLBSEL0@h 685 rlwimi %r8, %r6, 16, 14, 15 686 mtspr SPR_MAS0, %r8 687 isync 688 689 /* Select EPN (entry within the way) */ 690 rlwinm %r8, %r7, 12, 13, 19 691 mtspr SPR_MAS2, %r8 692 isync 693 tlbre 694 695 /* Check if valid entry */ 696 mfspr %r8, SPR_MAS1 697 andis. %r9, %r8, MAS1_VALID@h 698 beq next_entry /* invalid entry */ 699 700 /* Check if this is our TID */ 701 rlwinm %r9, %r8, 16, 24, 31 702 703 cmplw %r9, %r3 704 bne next_entry /* not our TID */ 705 706 /* Clear VALID bit */ 707 rlwinm %r8, %r8, 0, 1, 31 708 mtspr SPR_MAS1, %r8 709 isync 710 tlbwe 711 isync 712 msync 713 714next_entry: 715 addi %r7, %r7, 1 716 cmpw %r7, %r5 717 bne loop_entries 718 719 /* Next way */ 720 addi %r6, %r6, 1 721 cmpw %r6, %r4 722 bne loop_ways 723 724 /* Restore MSR (possibly re-enable interrupts) */ 725 mtmsr %r10 726 isync 727 728tid_flush_end: 729 blr 730 731/* 732 * Cache disable/enable/inval sequences according 733 * to section 2.16 of E500CORE RM. 734 */ 735ENTRY(dcache_inval) 736 /* Invalidate d-cache */ 737 mfspr %r3, SPR_L1CSR0 738 ori %r3, %r3, (L1CSR0_DCFI | L1CSR0_DCLFR)@l 739 msync 740 isync 741 mtspr SPR_L1CSR0, %r3 742 isync 7431: mfspr %r3, SPR_L1CSR0 744 andi. %r3, %r3, L1CSR0_DCFI 745 bne 1b 746 blr 747 748ENTRY(dcache_disable) 749 /* Disable d-cache */ 750 mfspr %r3, SPR_L1CSR0 751 li %r4, L1CSR0_DCE@l 752 not %r4, %r4 753 and %r3, %r3, %r4 754 msync 755 isync 756 mtspr SPR_L1CSR0, %r3 757 isync 758 blr 759 760ENTRY(dcache_enable) 761 /* Enable d-cache */ 762 mfspr %r3, SPR_L1CSR0 763 oris %r3, %r3, (L1CSR0_DCPE | L1CSR0_DCE)@h 764 ori %r3, %r3, (L1CSR0_DCPE | L1CSR0_DCE)@l 765 msync 766 isync 767 mtspr SPR_L1CSR0, %r3 768 isync 769 blr 770 771ENTRY(icache_inval) 772 /* Invalidate i-cache */ 773 mfspr %r3, SPR_L1CSR1 774 ori %r3, %r3, (L1CSR1_ICFI | L1CSR1_ICLFR)@l 775 isync 776 mtspr SPR_L1CSR1, %r3 777 isync 7781: mfspr %r3, SPR_L1CSR1 779 andi. %r3, %r3, L1CSR1_ICFI 780 bne 1b 781 blr 782 783ENTRY(icache_disable) 784 /* Disable i-cache */ 785 mfspr %r3, SPR_L1CSR1 786 li %r4, L1CSR1_ICE@l 787 not %r4, %r4 788 and %r3, %r3, %r4 789 isync 790 mtspr SPR_L1CSR1, %r3 791 isync 792 blr 793 794ENTRY(icache_enable) 795 /* Enable i-cache */ 796 mfspr %r3, SPR_L1CSR1 797 oris %r3, %r3, (L1CSR1_ICPE | L1CSR1_ICE)@h 798 ori %r3, %r3, (L1CSR1_ICPE | L1CSR1_ICE)@l 799 isync 800 mtspr SPR_L1CSR1, %r3 801 isync 802 blr 803 804/* 805 * int setfault() 806 * 807 * Similar to setjmp to setup for handling faults on accesses to user memory. 808 * Any routine using this may only call bcopy, either the form below, 809 * or the (currently used) C code optimized, so it doesn't use any non-volatile 810 * registers. 811 */ 812 .globl setfault 813setfault: 814 mflr %r0 815 mfsprg0 %r4 816 lwz %r4, TD_PCB(%r2) 817 stw %r3, PCB_ONFAULT(%r4) 818 mfcr %r4 819 stw %r0, 0(%r3) 820 stw %r1, 4(%r3) 821 stw %r2, 8(%r3) 822 stw %r4, 12(%r3) 823 stmw %r13, 16(%r3) /* store CR, CTR, XER, [r13 .. r31] */ 824 li %r3, 0 /* return FALSE */ 825 blr 826 827/************************************************************************/ 828/* Data section */ 829/************************************************************************/ 830 .data 831 .align 3 832GLOBAL(__startkernel) 833 .long begin 834GLOBAL(__endkernel) 835 .long end 836 .align 4 837tmpstack: 838 .space TMPSTACKSZ 839tmpstackbound: 840 .space 10240 /* XXX: this really should not be necessary */ 841 842/* 843 * Compiled KERNBASE locations 844 */ 845 .globl kernbase 846 .set kernbase, KERNBASE 847 848#include <powerpc/booke/trap_subr.S> 849